Ostomy bag



FIG. 1 is a rear elevation view of an ostomy bad incorporating our new design, wherein the generally oval surface, bounded by the thicker dashed line and thinner inner dashed line, is shown in white and is part of the claimed design;

FIG. 2 is a front elevation view of the ostomy bag of FIG. 1, wherein the generally oval surface is shown in white and is part of the claimed design.

The dashed lines found in the figures and all surfaces not shown form no part of the claimed design. 

CLAIM The ornamental design for an ostomy bag, as shown and described. 